How To Build Hollow Concrete Block Retaining Wall
The height of the wall and soil type determine the footing size and steel reinforcement requirements so check with a building authority for regulations and engineering specifications and for any required.
How to build hollow concrete block retaining wall. However hollow concrete block walls are not structurally very strong and will not resist the flexural stress that a wall is subjected to causing them to collapse easily. Tall wall excavate a trench deep enough to accommodate 4 to 6 in. Flexural stress comes from the pressure of the load the walls bear from the upper floors or roof of a house or from storms or seismic activity. Of leveling sand and half the height of the first course of blocks.
Sweep away all debris from the top of the first course of block with a broom. Of compacted base 1 in. In this case the top of the excavation is sometimes. How to build a concrete wall figure a.
Then hollow blocks are filled with concrete base as an anchor for a solid stable wall capable of resisting pressure from soil and water. Stack the second course of blocks on top of the first course making sure they remain level. Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on. Fill the concrete cores with crushed gravel.
Follow the block manufacturer s instructions for wall height limits. Backfill with gravel behind the wall to cover the drainage pipe.